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The recent origins of spliceosomal introns revisited
Journal article   Peer reviewed

The recent origins of spliceosomal introns revisited

John M Logsdon
Current opinion in genetics & development, Vol.8(6), pp.637-648
1998
DOI: 10.1016/S0959-437X(98)80031-2
PMID: 9914210

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Abstract

Does the intron/exon structure of eukaryotic genes belie their ancient assembly by exon-shuffling or have introns been inserted into preformed genes during eukaryotic evolution? These are the central questions in the ongoing ‘introns-early’ versus ‘introns-late’ controversy. The phylogenetic distribution of spliceosomal introns continues to strongly favor the intronslate theory. The introns-early theory, however, has claimed support from intron phase and protein structure correlations.
GAPDH glyceraldehyde 3-phosphate dehydrogenase IL introns-late LCA last common ancestor of life IE introns-early TPI triose-phosphate isomerase

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